private DrawableItem CreateItem(Point begin, Point end)
{
DrawableItem item = null;
if (DrawingMode == Mode.Rectange)
{
item = new Rectangle(begin.X, begin.Y, end.X - begin.X, end.Y - begin.Y);
}
else
{
item = new Ellipse(begin.X, begin.Y, end.X - begin.X, end.Y - begin.Y);
}
return item;
}
public void CreateOrChangeItem(Point begin, Point end)
{
if (end != begin)
{
if (_selectedItem == null)
{
_items.Add(CreateItem(begin, end));
}
else
{
ChangeItem(_selectedItem, begin, end);
}
_isCreatingItem = null;
Controller.Instance.InvalidateCanvas();
}
}
public void SelectItem(Point location)
{
_selectedItem?.Deselect();
_selectedItem = null;
foreach (var item in _items)
{
if (item.IsOnLocation(location))
{
item.Select();
_selectedItem = item;
break;
}
}
Controller.Instance.InvalidateCanvas();
}
public void IsCreating(Point begin, Point end)
{
if(_selectedItem != null)
{
_isCreatingItem = _selectedItem;
}
if(_isCreatingItem == null)
{
_isCreatingItem = CreateItem(begin, end);
_isCreatingItem.Color = Color.Gray;
}
else
{
ChangeItem(_isCreatingItem, begin, end);
}
Controller.Instance.InvalidateCanvas();
}
private void ChangeItem(DrawableItem item, Point begin, Point end)
{
item.Move(begin.X, begin.Y, end.X - begin.X, end.Y - begin.Y);
}